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| 型号： | LT1990IS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP DIFF +/-250V MCRPWR 8SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 差分 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.55 V/µs |
| -3db带宽： | 105kHz |
| 电压 - 输入偏移： | 900µV |
| 电流 - 电源： | 140µA |
| 电流 - 输出 / 通道： | 22mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 36 V，±1.35 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
LT1990
1
1990fb
■ Battery Cell Voltage Monitoring
■ High Voltage Current Sensing
■ Signal Acquisition in Noisy Environments
■ Input Protection
■ Fault Protected Front Ends
■ Level Sensing
■ Isolation
■ Pin Selectable Gain of 1 or 10
■ High Common Mode Voltage Range:
85V Window (VS = 5V, 0V)
±250V (VS = ±15V)
■ Common Mode Rejection Ratio: 70dB Min
■ Input Protection to
±350V
■ Gain Error: 0.28% Max
■ PSRR: 82dB Min
■ High Input Impedance: 2M
Differential,
500k
Common Mode
■ Micropower: 120
A Max Supply Current
■ Wide Supply Range: 2.7V to 36V
■ –3dB Bandwidth: 100kHz
■ Rail-to-Rail Output
■ 8-Pin SO Package
±250V Input Range
G = 1, 10, Micropower,
Difference Amplifier
The LT
1990 is a micropower precision difference ampli-
fier with a very high common mode input voltage range. It
has pin selectable gains of 1 or 10. The LT1990 operates
over a
±250V common mode voltage range on a ±15V
supply. The inputs are fault protected from common
mode voltage transients up to
±350V and differential
voltages up to
±500V.TheLT1990isideallysuitedforboth
high side and low side current or voltage monitoring.
On a single 5V supply, the LT1990 has an adjustable 85V
input range, 70dB min CMRR and draws less than 120
A
supply current. The rail-to-rail output maximizes the dy-
namic range, especially important for single supplies as
low as 2.7V.
The LT1990 is specified for single 3V, 5V and
±15V
supplies over both commercial and industrial temperature
ranges. The LT1990 is available in the 8-pin SO package.
Full-Bridge Load Current Monitor
RS
+VSOURCE
IL
–12V
≤ VCM ≤ 73V
VOUT = VREF ± (10 IL RS)
–
+
40k
100k
900k
1M
900k
10k
VOUT
LT1990
LT6650
GND
IN
OUT
FB
54.9k
20k
1nF
1
F
VREF = 1.5V
1990 TA01
5V
7
2
3
4
1
8
6
5
+
–
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
TYPICAL APPLICATIO
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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